package com.soft.cqlinglong.oto.web.interceptor;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 公用拦截器
 * Created by wangzhen on 2016/7/4.
 */
public class CommonInterceptor extends HandlerInterceptorAdapter {
    private static final String LOGIN_URL = "/login.htm";
    private static final String MAINTENANCE_URL = "/common/nositemesh/maintenance.htm";
    private static final String NO_PERMISSION = "/common/nositemesh/nopermission.htm";//无权限跳转页面

    private static Logger logger = LoggerFactory.getLogger(CommonInterceptor.class);

    @Value("#{configProperties['sessionTimeOut']}")
    private int sessionTimeOut;

    /**
     * 在业务处理器处理请求之前被调用
     * 如果返回false  从当前的拦截器往回执行所有拦截器的afterCompletion(),再退出拦截器链
     * 如果返回true  执行下一个拦截器,直到所有的拦截器都执行完毕,再执行被拦截的Controller ,然后进入拦截器链,
     * 从最后一个拦截器往回执行所有的postHandle() ,接着再从最后一个拦截器往回执行所有的afterCompletion()
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        logger.info("==============执行顺序: 1、preHandle================");
        return true;
    }

    /**
     * 在业务处理器处理请求执行完成后,生成视图之前执行的动作
     * 可在modelAndView中加入数据，比如当前时间
     */
    @Override
    public void postHandle(
            HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView)
            throws Exception {
        logger.info("==============执行顺序: 2、postHandle================");
    }

    /**
     * 在DispatcherServlet完全处理完请求后被调用,可用于清理资源等
     * 当有拦截器抛出异常时,会从当前拦截器往回执行所有的拦截器的afterCompletion()
     */
    @Override
    public void afterCompletion(
            HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        logger.info("==============执行顺序: 3、afterCompletion================");
    }


}
